Britain has become the first country in the world to allow the creation of human embryos from the DNA of three people, a technique intended to help mothers avoid passing on genetically degenerative diseases to their babies.

For years, parents of babies who seem likely to develop a peanut allergy have gone to extremes to keep them away from peanut-based foods. Now a major study suggests that is exactly the wrong thing to do.

This model of early potty training, called elimination communication, cuts down on diaper waste, expenses and rashes. It also helps parents become more in tune with their babies and bond during toilet time.